25963840 has 112 divisors (see below), whose sum is σ = 72127872. Its totient is φ = 8718336.

The previous prime is 25963831. The next prime is 25963841. The reversal of 25963840 is 4836952.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 25963840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25963841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149994 + ... + 150166.

Almost surely, 2^25963840 is an apocalyptic number.

25963840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25963840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36063936).

25963840 is an abundant number, since it is smaller than the sum of its proper divisors (46164032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25963840 is a wasteful number, since it uses less digits than its factorization.

25963840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 25963840 is about 5095.4725001711. The cubic root of 25963840 is about 296.1122048436.

The spelling of 25963840 in words is "twenty-five million, nine hundred sixty-three thousand, eight hundred forty".